Test device and test method for material creep under the coupling action of tensile stress and environment
A testing device and tensile stress technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve problems such as difficulty in using gravity or lever loading, limit the correlation of cement-based materials, and affect spring stress, etc. Guaranteed effective delivery, reduced restrictions, and improved accuracy
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Embodiment 1
[0051] Mixing ratio of cement asphalt mortar (kg / m 3 ): dry powder 1000, emulsified asphalt 160, water 110, water reducer 1.4, defoamer 0.05. According to the above ratio, after using a forced mixer to mix well, pour the freshly mixed cement asphalt mortar into a dumbbell-shaped mold of a certain size, and then put the test piece into a standard curing room (temperature T=20±3°C, RH≥95%) ) to the specified age and then taken out. Use the MTS810 testing machine to test the tensile strength of the cured specimens referring to GB / T228.1-2010 "Metallic Materials Tensile Test Part One: Room Temperature Test Method". According to the measured tensile strength, adopt the test device and test method of the present invention to apply 0.03, 0.15 and 0.30 stress levels (applied tensile stress / ultimate tensile stress) to the test piece respectively, and the control environment temperature is 20 ℃, relatively Humidity RH=60%. After the loading is completed, the strain interrogator 5 is ...
Embodiment 2
[0054] Mixing ratio of cement asphalt mortar (kg / m 3): dry powder 1000, emulsified asphalt 160, water 110, water reducer 1.4, defoamer 0.05. According to the above ratio, after using a forced mixer to mix well, pour the freshly mixed cement asphalt mortar into a dumbbell-shaped mold of a certain size, and then put the test piece into a standard curing room (temperature T=20±3°C, RH≥95%) ) to the specified age and then taken out. Use the MTS810 testing machine to test the tensile strength of the cured specimens referring to GB / T228.1-2010 "Metallic Materials Tensile Test Part One: Room Temperature Test Method". According to the measured tensile strength, adopt testing device and testing method of the present invention, apply 0.030 stress level (applied tensile stress / ultimate tensile stress) to test piece, set heating device target temperature as 20 ℃, 40 ℃ and 80°C, set relative humidity RH=60%. After the loading is completed, the strain interrogator 5 is turned on to carry...
Embodiment 3
[0057] Mixing ratio of cement asphalt mortar (kg / m 3 ): dry powder 1000, emulsified asphalt 160, water 110, water reducer 1.4, defoamer 0.05. According to the above ratio, use a forced mixer to mix well, then pour the freshly mixed cement asphalt mortar into a dumbbell-shaped mold of a certain size, and then put the test piece into a standard curing room (temperature 20±3°C, RH≥95%) Maintain it to the specified age and then take it out. Use the MTS810 testing machine to test the tensile strength of the cured specimens referring to GB / T228.1-2010 "Metallic Materials Tensile Test Part One: Room Temperature Test Method". According to the measured tensile strength, adopt the test device and test method of the present invention, apply 0.030 stress level (tensile stress / ultimate tensile stress) to test piece, set temperature to be 20 ℃, prepare control relative humidity to be respectively 33%, 75%, 59% and 98% supersaturated inorganic salt solutions. After the loading is complete...
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